Fabrication and Fluorescence Characterization of the Polyimides with Different Molecular Weights

Abstract:

In this paper, a series of polyimide (PI) films with different monomer mole ratios between PMDA and ODA (0.980: 1, 0.990: 1, 1.000: 1, 1.010: 1 and 1.015: 1) were prepared in order to investigate the effect of molecular weight on optical properties. Inherent viscosity values were taken as a measure of the molecular weight. The fluorescence properties of the PI films have been measured. The fluorescence spectra show that three obvious emission peaks can be observed at 583 nm (1.00 dL/g), 594 nm (1.42 dL/g) and 603 nm (1.57 dL/g) respectively. In addition, emission peaks show red-shift with the increase of molecular weight, which can attribute to the decease of orbital energy caused by conjugated effect.

• Periodical: Advanced Materials Research (Volumes 821-822)
• Pages: 957-960
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.821-822.957
• Online since: September 2013
• Authors: Jia Qi Lin, Pan Pan Zhang, Wen Long Yang
• Keywords: Film, Molecular Weight, Optical Property, Polyimide

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